include/lint.h

   1 /* NetHack 3.6  lint.h  $ANH-Date: 1454571508 2016/02/04 07:38:28 $  $ANH-Branch: master $:$ANH-Revision: 1.4 $ */
   2 /* NetHack may be freely redistributed.  See license for details. */
   3
   4 /*
   5  * Hacks to suppress compiler warnings.  Use with caution.
   6  * Assumes it has been preceded by '#include "config.h"' but
   7  * not necessarily by '#include "hack.h"'.
   8  */
   9 #ifndef LINT_H
  10 #define LINT_H
  11
  12 /* cast away implicit const from a string literal (caller's responsibility
  13    to ensure that) in order to avoid a warning from 'gcc -Wwrite-strings'
  14    (also caller's responsibility to ensure it isn't actually modified!) */
  15 #define nhStr(str) ((char *) str)
  16
  17 #if defined(GCC_WARN) && !defined(FORCE_ARG_USAGE)
  18 #define FORCE_ARG_USAGE
  19 #endif
  20
  21 #ifdef FORCE_ARG_USAGE
  22 /* force an unused function argument to become used in an arbitrary
  23    manner in order to suppress warning about unused function arguments;
  24    viable for scalar and pointer arguments */
  25 #define nhUse(arg) nhUse_dummy += (unsigned) !(arg)
  26 extern unsigned nhUse_dummy;
  27 #else
  28 #define nhUse(arg) /*empty*/
  29 #endif
  30
  31 /*
  32  * This stuff isn't related to lint suppression but lives here to
  33  * avoid cluttering up hack.h.
  34  */
  35 /* [DEBUG shouldn't be defined unless you know what you're doing...] */
  36 #ifdef DEBUG
  37 #define showdebug(file) debugcore(file, TRUE)
  38 #define explicitdebug(file) debugcore(file, FALSE)
  39 #define ifdebug(stmt)                   \
  40     do {                                \
  41         if (showdebug(__FILE__)) {      \
  42             stmt;                       \
  43         }                               \
  44     } while (0)
  45 #ifdef _MSC_VER
  46 /* if we have microsoft's C runtime we can use these instead */
  47 #include <crtdbg.h>
  48 #define crtdebug(stmt)                  \
  49     do {                                \
  50         if (showdebug(__FILE__)) {      \
  51             stmt;                       \
  52         }                               \
  53         _RPT0(_CRT_WARN, "\n");         \
  54     } while (0)
  55 #define debugpline0(str) crtdebug(_RPT0(_CRT_WARN, str))
  56 #define debugpline1(fmt, arg) crtdebug(_RPT1(_CRT_WARN, fmt, arg))
  57 #define debugpline2(fmt, a1, a2) crtdebug(_RPT2(_CRT_WARN, fmt, a1, a2))
  58 #define debugpline3(fmt, a1, a2, a3) \
  59     crtdebug(_RPT3(_CRT_WARN, fmt, a1, a2, a3))
  60 #define debugpline4(fmt, a1, a2, a3, a4) \
  61     crtdebug(_RPT4(_CRT_WARN, fmt, a1, a2, a3, a4))
  62 #else
  63 /* these don't require compiler support for C99 variadic macros */
  64 #define debugpline0(str) ifdebug(pline(str))
  65 #define debugpline1(fmt, arg) ifdebug(pline(fmt, arg))
  66 #define debugpline2(fmt, a1, a2) ifdebug(pline(fmt, a1, a2))
  67 #define debugpline3(fmt, a1, a2, a3) ifdebug(pline(fmt, a1, a2, a3))
  68 #define debugpline4(fmt, a1, a2, a3, a4) ifdebug(pline(fmt, a1, a2, a3, a4))
  69 #endif
  70 #else
  71 #define debugpline0(str)                 /*empty*/
  72 #define debugpline1(fmt, arg)            /*empty*/
  73 #define debugpline2(fmt, a1, a2)         /*empty*/
  74 #define debugpline3(fmt, a1, a2, a3)     /*empty*/
  75 #define debugpline4(fmt, a1, a2, a3, a4) /*empty*/
  76 #endif                                   /*DEBUG*/
  77
  78 #endif /* LINT_H */